Forum Discussion
DrewE
Jun 09, 2016Explorer II
I think a more reliable solution would be to use some sort of a proper timer circuit. Something like the ubiquitous 555 timer feeding a solid state relay or a traditional relay via a driver transistor would give a more reliable timing, have a much lower initial current when switched on, and use a much smaller and less costly capacitor. Putting in a trimpot would allow the time delay to be adjustable. The data sheet has lots of nice charts giving the timing for various timing capacitor and resistor combinations.
(Actually, if I were doing this, I would rig up a little microcontroller to do the timing because I like little microcontrollers, but there's no real objective reason why it's inherently a whole bunch superior to a simple timer.)
(Actually, if I were doing this, I would rig up a little microcontroller to do the timing because I like little microcontrollers, but there's no real objective reason why it's inherently a whole bunch superior to a simple timer.)
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